I am fairly certain this falls under the category of bugs, but posting here for feedback before submitting as such.
Successive ModelBuilder tool dialogs open outside display area on large monitor
Date: 13 June 2025
ArcGIS Pro 3.5.1
Windows 11 Insider Preview Build 26120
Asus VP28U Display (3840 x 2160 pixels) with GeForce GTX 1060 3GB (NVIDIA software up to date)
Scale: 200% (150% is recommended) [The opinion of two twentysomethings I had look at my screen is that 200% is ideal for them, too.]
General Issue:
In certain monitor configurations, when editing a model, the open dialog boxes for some tools open outside of the monitor's pixel area range. The anchor point appears to be miscalculated. The configuration, in my case, is a 3840 x 2160 monitor set to 200% scale.
I first encountered this in the provided model in the ESRI web course "Building Geoprocessing Models Using ArcGIS Pro" in the exercise "Explore an existing model." When I open the 50 Ft. Gas Line Buffer tool, the dialog window loads outside the screen area. The first tool loaded into the model opens at the bottom of the window. Its output dialog opens a bit to the right. Second and subsequent tool and their output dialogs open march further to the right until they are opening outside the monitor screen. I was unable to move these dialogs with alt-spacebar-m.
Screenshot attached.
I also tested this behavior opening ModelBuilder in an empty map and dragging the buffer tool four times into the model. The same behavior was observed. At different monitor scales, windows sometimes opened above and to the left of the monitor active area, occasionally with a small portion on the screen that could not be dragged. The workaround is to open ArcGIS and edit the model at 100% monitor scale using Windows magnifier (Windows Key and "+").
I think there should be a check on ModelBuilder dialog anchor locations and size when they are opened to make sure they will be useable on the user's screen.
I consider this an accessibility issue.